20782400

素因数分解:

$2^6\times 5^2\times {\mathrm{31}}^1\times {\mathrm{419}}^1$

素因数の和:472

約数の個数: 84

約数和(自身を含む): 52913280

約数和(自身を除く): 32130880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 32, 40, 50, 62, 64, 80, 100, 124, 155, 160, 200, 248, 310, 320, 400, 419, 496, 620, 775, 800, 838, 992, 1240, 1550, 1600, 1676, 1984, 2095, 2480, 3100, 3352, 4190, 4960, 6200, 6704, 8380, 9920, 10475, 12400, 12989, 13408, 16760, 20950, 24800, 25978, 26816, 33520, 41900, 49600, 51956, 64945, 67040, 83800, 103912, 129890, 134080, 167600, 207824, 259780, 324725, 335200, 415648, 519560, 649450, 670400, 831296, 1039120, 1298900, 2078240, 2597800, 4156480, 5195600, 10391200, 20782400]

約数ペア:

[(1, 20782400), (2, 10391200), (4, 5195600), (5, 4156480), (8, 2597800), (10, 2078240), (16, 1298900), (20, 1039120), (25, 831296), (31, 670400), (32, 649450), (40, 519560), (50, 415648), (62, 335200), (64, 324725), (80, 259780), (100, 207824), (124, 167600), (155, 134080), (160, 129890), (200, 103912), (248, 83800), (310, 67040), (320, 64945), (400, 51956), (419, 49600), (496, 41900), (620, 33520), (775, 26816), (800, 25978), (838, 24800), (992, 20950), (1240, 16760), (1550, 13408), (1600, 12989), (1676, 12400), (1984, 10475), (2095, 9920), (2480, 8380), (3100, 6704), (3352, 6200), (4190, 4960)]